Gear for automobiles, &amp;c.



PATENTBD JUNE 18, 1907 K. SGHNAITMANN, GEAR FOR AUTOMOBILES, 65o.

APPLICATION FILED DBU. 3, 1906.

L SHEETS-SHEET 1.

Y QQ

110.857,114. PATENTED JUNE 18, 1907.

K SUHNMTPLMNN GEAR PGR AUTGMGBILES, dao.

APPLICATION FILED .11110,3. 19064 ,a 4 sfuma-SHEET 2.

PATENTED JUNE 18,l 1907.

K. SGHNAITMANN. GEAR FOR AUTOMOBILES, dw.

APPLIUATIOH FILED DEO.3.1906.

4 slums-SHEET 3.

UNITED STATES PATENT OFFICE.

KARL SCHNAITBVIANN, OF UNTERTRKHEIM, GERMANY, ASSIGNOR TO THE FIRM OF DAIMLER-MOTOREN-GESELLSCHAFT, OF UNTERTRKHEIM,

GERMANY.

GEAR FOR AUTOMOBILES, 2C-

mo. awhile.

lSpecification. of Letters Patent.

Patented June 18, 1907.

Application led December 3,1906. SoriaYNo. 346,159

1'0 tu 'Lv/tom it may concern:

Be it knownthat I, KARL SGHNAITMANN, a subject of the King of Wrtemberg, and a resident of Untertrkheim-on-the-Neckar, in the Kingdom of Wrtemberg, German E1npire, have invented a new and useful lmproved Train of Gears for Automobiles and the Like Vehicles, of which the following is an exact specification. i

My invention relates to an improved train of gears Vfor changing the speed for automobiles and the like vehicles and more especially for such automobiles in which a differential shaft and a driving shaft is arranged. Ade vice which has the saine object has been described by me in my copending United States atent application Serial No. 346157 liled ecernber-rd 06. This last mentioned. application describes a train of gears which is provided with a driving shaft, upon which a bevel wheel is arranged loosely but not adapted to slide longitudinally,y and engages with a bevel wheel of the so-called difierential shaft.

. According' to the present invention I have provided for a bevel wheel arranged on the driving shaft adapted to slide but ndt to rotate relatively to the latter and this bevel wheel is adapted to be thrown into gear with the bevel wheel of the differential shaft and to be disengaged therefrom.y Provisions are made according to my invention to set the slidable bevel wheel on the driving shaft when engaging with the bevel wheel of the differential shaft and to release it vfor the purpose of disengaging the wheels one vtrom another. Owing to this disengagement of the latter wheels the objectionable noise of the idle running too thedwheels is avoided, which occurs in the arrangement of iny co-pending application. i

.ln order to make my invention clear, l refer to the accompanying drawings, in which l Figure- 1 is a fragmentary sectional plan view of my improved train oi' gears, Fig. 2 is a vertical cross section on line B-B of Fig 1, Fig. 3 is a modified construction in a fragmentary sectional plan view, Fig. 4 is a vertical cross section on line A-A of F ig. 3, Fig. 5 is a longitudinal horizontal section of the slidable Ybevel wheel of the modified structure according to Fig. 3, on line O O.

Fia. 6 is a vertical cross section on line E-E of? ig. 5 y Fig. 7 is a cross section on line D-D of Fig. 3, Figs. 8 et 9 are details in a perspective view, Fig. 1() is a modilication in a horizontal cross section intended to illustrate the arrangement used as a coupling device only.

The dil'erential shaft ct suitably mounted in the frame of the automobile (not further shown) is provided with two bevel wheels f b b2. cis a driving-shaf t havingledges or tongues c (see Fig. 2) projecting into grooves of the hubs of the different wheels arranged on the shaft c whereby the wheels are keyed to the shaft. b is a conical wheel and is adapted to be displaced on the shaft c and to be set fast thereon or released in the-manner as will hereinafter be. fully described.

The hub d of the bevel wheel l) is extended to the iefthand side, as to form a socket part di. This part d2 is recessed on opposite sides to receive in its recesses pawls 1n. m are pins of the ,pawls arranged in corcrsponding recesses oi the sockctpa1't d2 and shaped, t0 enable the socket-part to rotate within the ring g embracing the part d2. The pawl m is provided with a hook or nose n and a spring o located in holes of the hub d tends to force the nose against the shaft c. At its other end the pawl m is provided with a projection p. On the side adjacent to thc projection p the ring q is slightly tapered on its inside and is in contact with the pawl m on its righthand end.

1' is a rirn for retaining thc ring gon the socket d2.

The hub d is rectangularly inwardly turned, as to forni a st-op n sliding therewith on the recessed part of the shalt c.

(l is a toothed wheel formed integrally 'with the bevel wheel t. The setting ring q is built up of two parts hinged with cach other by a pin o and connected with each other by a screw c. Toothed wheels 7L h2 arc niadc integrally with a socket piece c2 and adapted to engage with l toothed wheels 'L'J "/r tively. The toothed wheels L 722 are adapted to slide but not to rotate on the driving shaft c and can be displaced or shifted by means of the setting .rod c.

g is a counter shaft carrying the toothed Wheel d, adapted to engage with thc toothed wheel d, and the bevel wheel b3, iixcdly arranged thereon.

rospec- IOO Yihe operation Vof this construction 'will be readily understood. The driving shaft c transmits no motion to the differential shaft a and to the counter shaft g in the position of the wheels as illustrated. For operating directly the differential shaft by the driving shaft c, the bevel Wheel b is displaced by means of the setting rod e to the righthand side till the nose m2 of the pawl m is opposite to the recess c3 of the shaft c. v ln this position the nose is forced into the recess c3 by the action of the spring o and the bevel Wheel b is held in engagement with` the Wheel b.

For releasing the driving shaft the setting rod e is moved to the lefthand side, so that the projection p interferes with the tapered inner surface of the ring g the vlefthand end of the pawl m is depressed and the nose lm2 vremoved from the recess c3. New by further movement of the ring to th lefthand side the'l bevel Wheel b can be shifted on the driving shaft and is thereby disengaged Afrom the bevel Wheel b'.

l is displaced to the In the modification shown in the Figs. 3 to 9 for the paWls setting pieces m3 are provided. These setting pieces are arranged in a hole n of the shaft c, and each piece is rovided With a wedge-shaped cut o.' A gui ing pin n of the one setting piece projects into a cylindrical boring n2v of the other setting piece, and o-is a spring intended to force ra dially outward both the setting pieces m3. i is an adjusting or governing rail (see Fig. 9) mounted in the groove i of the hub d. i' is a recess provided in the adjusting rail i embracing therewith the setting piece main a distinct position of the bevel Wheel b. The head k isr arranged in the recess 'is' provided partially in the hub d@ and in the extended hub (Z2, having an annular projection k2. The head is provided With a guiding groove 7c3 receiving therein the setting ring g. lt will beiobserved that the bottom surface h4 vof the head il is curved in correspondence withv the inner diameter of the ring g. Ledges c projecting irit'o grooves of the hub d prevent the bevel Wheel b and the toothed Wheel d made integrally with the latter from loose rotation on the shaft c.

The construction as just described Works in the following manner The bevel Wheel b is prevented from longitudinal "movement when engaging With the bevel Wheel b by the setting piecesm3 projecting into the recesses 7c of the hub d in such mannerthat the edges w 'of the setting-.pieces bear against the Walls :c of the recess 7c and a movement caused bythe axial thrust of the bevel gearing is made impossible thereby. For disengaging the bevel wheels o bthe guiding rail i ft hand side and the edge t" of the recessgpushes against the inclined bottom of the groove o and in moving along thereupon thesetting pieces m3- are forced into the recessi of the shaft c, so that shaft,

ieee m3 is removed from the recess k e Fig. l0 is shown A,a'bevel b alone. In tl the latter represents a coupling devite only the differential shaft a.

ila-ving thus fully described the nature of my invention, What l desire to secure by Letters lfatent of the United States is i. gearing comprising a differential bevel Wheel thereupomfa driving shaft, bevel Wheel, adapted to slide longitudinally but not to rotate on the driving shaft and engaging With said bevel wheel of vthe differenti'al shaft, means for locking the slidable bevel Wheel in engagement with the bevel wheel of the differential shaft, and means for shifting thebevel Wheelv on the. driving shaft.

2. 5i gearing comprising a differential shaft, tvc bevel Wheels thereon, a driving shaft, a bevel Wheel, adapted to slide longitudin ally but not to rotate on the driving shaft, means for setting fast the slidable bevel wheel when engaging with the bevel Wheel of the differential shaft, a counter shaft, a bevel Wheel and spur-Wheels fixedly arranged thereon, 'the last mentioned bevel Wheel en# for coupling the driving shaft c with I gaging with the other bevel Wheel of the dif- 9 5 ferential shaft, and means for shifting the slidable bevel Wheel of the driving shaft.

3'. .e gearing comprising a differential shaft, a `bevel Wheel thereupon, a driving sha a bevel Wheel, adapted to slide longitudiA Li but not to rotate on the driving shaft, this bevelwhe'el havingI an extended hub and grooves (il c) governing rails having heads 'and iocated in said grooves, setting pieces ar ranged in a hole ofthe driving shaft and having Wedgeesh aped grooves, adapted to cooperate with the guiding rails, a spring tend- IOC ing to force outwardly the setting pieces, and A a hinged setting ring engaging with the heads of the guiding rails.

4. A gearing vcomprising a differential shaft, bevel Wheels thereupon, a driving shaft, a bevel Wheel, adapted to slide longitudinally but not to rotate on the driving shaft, the bevel wheel having` an extended hub and provided Wffith grooves (il c), governing rails having heads and ,arranged in the aforementioned grooves, settingfpieces located: in a hole of .the driving shaft and provided with wedge-shaped grooves therein and cooperatwith the governing rails, a spring tending to force the setting pieces into the recesses (7d), a toothed Wheel made intevrally With the hub of the bevel-Wheel b, toothed Wheels adapted to vslide but not to rotate on the driving shaft, .a countershaft, and toothed Wheels on. the counter shaft, the latter Wheels engaging with the toothed Wheels of the dniving sl aft, anda bevel Wheel ixedly arranged on ythe counter shaft and engaging with the IIO other bevel w heels of the differential-l sini-tt, and ineens lfor disploeingir the slidable wheels oi' the driving` shalt.

A gearing comprising o ditl'ereniial shaft, two bevel wheels thereon, a driving shaft, obew'el-wheel adopted to slide but not to rotate :ind mounted on the driving shalt and having' un extended. hub, pziwls ari'mie'ed pivotolly in recesses of' the extended hub, springs Aforcingthe one end ol the pawls against the driving' Shaft, u setting ring elnbraeing the extendedhub and the pnwls, and adapted to operate the pawls as to remove the other end of the pziwls from the driving shaft, :L toothed wheel made integrz'ill)Y with the bevel wheel of the driving shaft, toothed wheels adapted to slide but not to rotate on 4thedrivinlg; shaft., a counter shaft, toothed wheels inode integrally with the counter shalt, :ind odopted to engage with the toothed wheels of the driving shaft, and. Si bevel wheel iixedly arranged on the counter shaft and en gagging; with the other wheel oi the ditl'erentizil sli-Litt.

lln witness whereof I have hereunto set my hand in the 'presence of two witnesses.

KARL SUHNATMAN N. Witnesses ROBERT W. MAUD, A ooLF STR( )n M. 

